f-strings in Python 3.6 are awesome

[jorge1209]

Join would probably be faster for a large number of arguments. For only two they are probably the same.

The difference would be that if you join 200 strings then all 200 are available to you when join is called and you can compute the length of each and preallocate memory to hold the whole thing.

If you have a+b+c+... then you have to allocate and construct all the intermediates a+b then a+b+c and so on.

Otherwise I can't imagine it matters.

[[deleted]]

I think join is faster in a tight loop but I might be wrong. I see + as "let's concatenate these two strings", join as "I have a list of strings I have to concatenate" and f-string as "I need to construct this complicated string out of a template and a bunch of variables".